API 510 Pressure Testing 3

Question 1

What type of fluid is preferred for hydrostatic pressure testing per ASME and API 510?

Accepted Answer

Water

Answer

Water is the preferred hydrostatic test medium because it is essentially incompressible and minimizes stored energy in the event of a failure.

Question 2

When is a pneumatic test permitted instead of a hydrostatic test per API 510?

Accepted Answer

When water is unavailable and the engineer approves

Answer

A pneumatic test may be substituted when the vessel cannot be safely filled with water or when design considerations prevent hydrostatic testing, with proper engineering approval.

Question 3

Per API 510, what is the maximum temperature of the test water during a hydrostatic pressure test to minimize brittle fracture risk?

Accepted Answer

At least 60°F (16°C)

Answer

The test water temperature should be at least 60°F (16°C) to reduce the risk of brittle fracture during pressure testing.

Question 4

After completing a successful hydrostatic test, what must be done before the vessel is returned to service?

Accepted Answer

Drain and dry the vessel if required by service

Answer

The vessel must be drained and dried as needed before returning to service, particularly if the process fluid is incompatible with water.

Question 5

Who is responsible for witnessing or reviewing the pressure test documentation for a vessel repair under API 510?

Accepted Answer

The authorized pressure vessel inspector (API 510)

Answer

The authorized pressure vessel inspector (API 510 certified) is responsible for witnessing or reviewing pressure test documentation for repairs.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Pressure Testing 3